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Kaylis [27]
3 years ago
10

Simplify.[2 × (10 + 5)] - 5

Mathematics
2 answers:
Sloan [31]3 years ago
7 0
[2 \times (10 + 5)] - 5 \\ \\ 2 \times 15 - 5 \\ \\ 30 - 5 \\ \\ 25 \\ \\ Answer: \fbox {C) 25}
N76 [4]3 years ago
4 0
2(10+5)−5 =(2)(15)−5 =30−5 =25 C is the answer.
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Hey please help me please help please
Airida [17]

1.

a) metres to centimetres :

multiply length by 100

b) metres to millimetres:

multiply length by 1000

c) kilograms to grams:

multiply the mass value by 1000

d) litres to millilitres :

multiply volume by 1000

2.

a) 3 m = 3× 100 = 300 cm

b) 28 cm = 28 × 10 = 280 mm

c) 2.4 km = 2.4 × 1000

= 24 × 10^-1 × 10^3

= 24 × 10^2 =2400 m

d) 485 mm =485 / 10

= 485 / 10 ^1

= 485 × 10 ^-1

= 48.5 cm

e) 35 cm = 35 / 100

= 35 /10^2

= 35 × 10 ^ -2

= 0.35 m

f) 2.4 m = 2.4 / 1000

= 24 × 10 ^-1 / 10^3

= 24 × 10^-1 × 10 ^-3

= 24 × 10 ^ -4

= 0.0024 km

g) 2495 mm = 2495 /1000

= 2495 /10^ 3

= 2495 × 10 ^-3

=2.495 m

4 0
3 years ago
If a is directly proportional to b/2 and a=1 when b=10, what is the value of a when b=35
iris [78.8K]
The value of a would be 3.5, as a=1 when b=10 means that a is worth 1/10 of b's value. 
5 0
3 years ago
What was the error in this equation?
PtichkaEL [24]

Answer:

The error is the solution.

The solution is all real numbers, or infinite amount of solutions.

Step-by-step explanation:

Step 1: Write equation

-4(2n - 3) = 12 - 8n

Step 2: Solve for <em>n</em>

  1. <u>Distribute -4:</u> -8n + 12 = 12 - 8n
  2. <u>Subtract 12 on both sides:</u> -8n = -8n
  3. <u>Add 8n to both sides:</u> 0 = 0

Here we see that <em>n</em> can equal any number. If you plug in any number <em>n</em>, it will render the equation true. Therefore, our solution is n = infinite amount of solutions.

n = 0 is only slightly correct. 0 does work as the solution, but there are solutions as well.

3 0
3 years ago
— 3y — 4х = -11<br> 3y — 5х = — 61
storchak [24]
Idkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
6 0
3 years ago
Read 2 more answers
Please help
german

Answer:

17 units

Step-by-step explanation:

Distance between points (a,b)\,,\,(c,d) is given by \sqrt{(c-a)^2+(d-b)^2}

The trail starts at P(−2, 2) and goes to Q(5, 2).

Take (a,b)=(-2,2)\,,\,(c,d)=(5,2)

PQ=\sqrt{(5+2)^2+(2-2)^2}=\sqrt{7^2}=7 units

It goes from Q to R(5, −5)

Take (a,b)=(5,2)\,,\,(c,d)=(5,-5)

QR=\sqrt{(5-5)^2+(-5-2)^2}=\sqrt{(-7)^2}=7 units

It goes from R to S.

Take (a,b)=(5,-5)\,,\,(c,d)=(8,-5)

RS=\sqrt{(8-5)^2+(-5+5)^2}=\sqrt{3^2}=3 units

PQ+QR+RS=7+7+3=17 units

4 0
3 years ago
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